Well that's a matter of opinion, I guess...

I think they probably like still like the taste of meat but don't wish to harm any animals.

...Or maybe not. Anyway, thanks for the debate and have a nice day :)

That's probably true, everything would look appealing because your body is in a crisis. You would do a lot of things in a crisis you wouldn't do otherwise.
But just because something is human nature does not mean it is the right thing to do... some people have the instinct or urge to murder/kill/rape. If they would choose to not do such things they would be denying their human urges, but I think that's a good thing, right? If our civilisation suddenly collapsed there would probably be a lot more of "illegal things" being done. Things that people otherwise wouldn't have done. That doesn't mean that they should be doing these things now. Also, slavery has played a huge part in our history. One could see it as a human instinct, something that just naturally develops, and maybe it would come back again if we would be out in the wild again after some time.
My point is that in some cases it can be a good thing to suppress one's instincts and maybe killing animals is one of them.

Is it really human instinct to eat meat though? I mean I personally don't enjoy looking at raw meat or the corpse of an animal, and I don't feel hungry looking at a deer for example. I'd much rather see it alive than dead :)

Isn't that what a friend is?